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  2. Electronic ticket - Wikipedia

    en.wikipedia.org/wiki/Electronic_ticket

    An electronic ticket is a method of ticket entry, processing, and marketing for companies in the airline, railways and other transport and entertainment industries. Airline ticket [ edit ] E-tickets in the airline industry were devised in about 1994, [1] and have now largely replaced the older multi-layered paper ticketing systems.

  3. Permissive action link - Wikipedia

    en.wikipedia.org/wiki/Permissive_Action_Link

    A permissive action link ( PAL) is an access control security device for nuclear weapons. Its purpose is to prevent unauthorized arming or detonation of a nuclear weapon. [1] The United States Department of Defense definition is: A device included in or attached to a nuclear weapon system to preclude arming and/or launching until the insertion ...

  4. Fare basis code - Wikipedia

    en.wikipedia.org/wiki/Fare_basis_code

    Fare basis code. A fare basis code (often just referred to as a fare basis) is an alphabetic or alpha-numeric code used by airlines to identify a fare type and allow airline staff and travel agents to find the rules applicable to that fare. Although airlines now set their own fare basis codes, there are some patterns that have evolved over the ...

  5. Computer reservation system - Wikipedia

    en.wikipedia.org/wiki/Computer_reservation_system

    History Preserved mainframe computer unit of the MARS-1 at the JR East Railway Museum in Saitama, September 2015. MARS-1. The MARS-1 train ticket reservation system was designed and planned in the 1950s by the Japanese National Railways' R&D Institute, now the Railway Technical Research Institute, with the system eventually being produced by Hitachi in 1958.

  6. Programmable Array Logic - Wikipedia

    en.wikipedia.org/wiki/Programmable_Array_Logic

    AMD 22V10 in 24-pin DIP. Programmable Array Logic ( PAL) is a family of programmable logic device semiconductors used to implement logic functions in digital circuits that was introduced by Monolithic Memories, Inc. (MMI) in March 1978. [1] MMI obtained a registered trademark on the term PAL for use in "Programmable Semiconductor Logic Circuits".

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